R help - Dec 2006 - Drawing a 3-D plot for PCA?

Hi All,

Can anyone point me a hint (package) how to draw a 3D plot using the first 3
components from PCA?

Thanks a lot,

FD

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> Can anyone point me a hint (package) how to draw a 3D plot using the first
3
You might want to have a look at ggobi (http://www.ggobi.org) and
rggobi (http://www.ggobi.org/rggobi) which will allow you to look at
any number of principle coordinates.  (And don't forgot to look at the
high ones - interesting structure is often revealed there)

Hadley

On Thu, 2006-12-21 at 16:28 -0600, Frank Duan wrote:
> Hi All,
> 
> Can anyone point me a hint (package) how to draw a 3D plot using the first
3
> components from PCA?
> 
> Thanks a lot,
> 
> FD
See ?ordiplot3d and ?ordirgl in package vegan. rda() in that package can
be used to perform PCA, which can then be drawn in 3D using the rgl
package or the scatterplot3d package, the former allowing dynamic
rotation and zooming of the ordination configuration.

HTH

G

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